@Type(type = "com.TaskType", parameters = {
            @Parameter(name = "TASK1", value = "com.TaskType1"),
            @Parameter(name = "TASK2", value = "com.TaskType2"),
            @Parameter(name = "TASK3", value = "com..TaskType3")
        })
        @Access(value = AccessType.FIELD)
        private CustomerTaskType taskType;

public class TaskType
    implements ParameterizedType, UserType, Serializable{
.....
}